Rolls for punching and creasing h o rsesh o e- blanks



(No Model.) 2 Sheets-Sheet L E. FIRTH & J. OORNTHWAITE. ROLLS FORPUNGHING AND OREASING HORSESHOE BLANKS.

No. 392,505. Patened Nov. 6, 1888.

(No Model.) 2 Sheets-Sheet 2.

E. FIRTH 8v J. OORNTHWAITE. I ROLLS FOR PUNGHING AND OREASING HORSBSHOE BLANKS.

No. 892,505. I I Patented Nov. 6, 1888.

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EDl/VIN FIRTH AND JACOB OORNTHVVAITE, OF TROY, FElV YORK.-

ROLLS FOR PUNCHING AND CREASING HORSESHOE=BLANKS SPE CIPICATION forming part oi Letters Patent No. 392,505, dated Nev-ember 6, 1888.

Application filed May 10, 1888. Serial No. 273,351.

To aZZ whom it may concern:

Be it known that we, EDWIN Frn'rit and Moon Conurnwnrrn, citizens of the United States, residing at Troy, in the county of Itenssclaer and State of New York, have invented a new and useful Improvement in ltolls for Punching and Oreasing Horseshoe-Blanks, of which the following is a specification.

Our invention relates to an improvement in rolls for punching and creasing horseshoeblanks; and it consists, first, in varying the diameter of the rolls proportionally to the thickness of the blanks to be punched to avoid breaking the punches; and, secondly, in the peculiar construction and combination of do vices, that will be more fully set forth hereinafter, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is an end elevation of a pair of punching and creasing rolls embodying our improvements. Fig. 2 is an edge View of the same. Fig. 3 is a vertical sectional view of the same, taken on the line 00 00 of Fig. 1. Fig. 4 is a sectional view on line 3 3 of Fig. 1.

The difficulty heretofore encountered in punching horseshoe-blanks by means of rolls is that the punches speedily become broken and rendered useless, and this objection is of such moment as to have entirely p reventcd the adoption of rolls for this purpose. We have discovered that by enlarging the diameters of the rolls proportionally with the thickness of the blanks to be punched and to the length of the punches that the latter will be caused to operate in the blanks while the rolls are moving through a very small proportion of arevolntion, so that the angles at which the punches are presented to the blanks while entering and. leaving the same will be so slight that the radii of the rolls will fall within the bases of the said punches, and hence the latter will not be subjected to i njury or lateral strain, thereby rendering the punches sufllciently durable for.

practical purposes.

In carrying our invention into effect, A 13 represent a pair of rolls of similar size and from two to six feet in diameter, according to the size of the blank to be operated upon. The perimeter of thelower roll is plane. The perimeter of the upper roll is formed of two annular rings, 0 D,which are secured together (No in ulel.)

by transverse bolls E, and between the opposing sides of the said rings are formed oblong openings F. In thesaid openings are arranged removable blocks G, the outer sides of which are curved to correspond with the radius of the roll and are provided with raised dies or.

flanges H, which are arranged longitudinally thereon, and are adapted to form the creases or grooves in the horseshoe-blanksfor the recep tion of the nail-heads. From the said dies or flanges project pointed punches I of suitable length and size to form the nail-holes in the horseshoe blanks. In the ring I) are transverse threaded openings, which communicate with the openings F, and in the said openings are arranged clamping-screws K, which are adapted to bear against the sides of the blocks, so as to secure the same firmly in their seats. The upper roll is further provided with a series of radial ontwardly-extending adjustingscrews, L, which engage threaded openingsin its rim and have their outer ends bearing against the inner sides of the blocks, the func tion of these screws being to adjust the said blocks radially toward and from the center of the rolls, as will be readily understood. In the periphery of the upper roll, at a suitable distance apart, are annular grooves M, and the lower roll is provided with corresponding annular flanges,l\l,which are adapted to enter said grooves.

The operation of our invention is as follows: The rolls are rotated 'in the direction indicated by the arrows in Fig. 1, and the horseshoeblauk a is fed between the said rolls in the form of a bar of steel or iron of suitable length, breadth, and thickness, and heated to a suitable degree. As the rolls rotate, the faces of the blocks engage the blank rod in succession, draw the same between therolls, and cause the flanges or punching-ribs H of the blocks to make the grooves or creases in the blank, and the punches are also forced through the blank, so as to make the nail-holes therein. Owing to the size of the rolls the punches are forced into and withdrawn from the blank while the rolls are moving through a comparatively smallproportion of the revolution, and thereby the punches are not subjected to injurious lateral strain, as before slated. \Ve have found by practical tests that we are enabled to obtain the best results by varying the size of the diameters ofthe rolls according to the thick ness of the blank. A roll eighteen inches in diameter will operate successfully to punch holes in a piece of iron one-sixteenth of an inch in thickness, a roll thirty inches in diameter will punch a hole through apiece of iron one-eighth of an inch thick, a forty-inch roll will punch iron one-fourth of an inch thick, a five-foot roll will punch iron nine-sixteenths of an inch in thickness, a six-foot roll will punch iron three-fourths of an inch in thickness, and so on in about the same proportion.

It is essential to theperfect operation of the machine that the punches should be cooled in succession after acting on the hot blank to prevent them from losing their temper. In order to accomplish this result we arrange a reservoir or tank, R, over the upper roll, pro vide a brush, S, having wire bristles, which bear upon the punches on the upper side of the upper roll and have a perforated pipe, P,

which communicates with the tank or reservoir and is adapted to feed the contents thereof to the bristles of the brush, and has a stop-cock, U, to regulate the supply of fluid to to the brush. A suit-able chemical solution is placed in the tank or reservoir and has the property of cooling the punches as the same are presented to the brush without crystallizing the steel in the punches and destroying the cohesion of the molecular particles thereof.

In order to prevent the points ofthe punches from being dulled by impinging against the periphery of the lower roll, we provide the latter with a dovetailed peripheral groove, a, in which is placed a copper rod, 1), which entirely encircles the lower roll and has its ends con nected. Before removing the lower roll from the lathe 011 which it is turned and finished a spinning-tool is caused to bear against the said copper rod while the roll is in rotation, the effect of the said spinning-tool being to mash and spread the copper rod down into the groove and cause it to fit snugly therein.

Vhen the machine is in operation, the copper band on the lower roll receives the impact of the points of the punches as the same pass through the blanks, thereby preventing said punches from being dulled.

Vc do not limit ourselves to the use of'copper for this purpose, as other soft metals may be used in lieu thereof.

Having thus described our invention, we claim-- l. The rolls for punching horseshoeblanks, the diameters of the said rolls varying according to the thickness of the blanks in about the proportions described.

2. The rolls having the punches for making holes in horseshoe-blanks, the diameter of the rolls being such that the same will move through only a small proportion of a revolution while each punch is operating on the blank, whereby lateral strain on the punches is avoided, substantially as described.

3. The combination, with the rolls, of the blocks secured to one of the rolls and removable therefrom, said blocks having the raised flanges or dies H, substantially as described. 4. The combination, with the rolls, of the blocks secured to and detachable from one of the rolls, said blocks having the punches I, substantially as described.

5. The combination, with the rolls, of the blocks secured to and detachable from one of the rolls, said blocks having the raised flanges or dies H, and the punches I,projeeting therefrom, substantially as described.

6. The combination of the roll A, having the peripheral recesses, with the punching blocks or dies arranged in said recesses, and the clamping-screws to secure the said punches and dies in position, substantially as described.

7. The combination of the roll A, having the peripheral recesses, the punching-blocks arranged in the said recesses, and the screws to move said blocks radially therein, substantially as described.

8. The combination, in a roller for the purpose set forth, of the rings 0 D, bolted together and having the oblong openings F formed in their opposing sides, substantially as described. I

9. The combination of the roll A, having the annular grooves M and provided with the punches, with the roll 13, having the annular tongues or flanges N, engaging the grooves M, substantially as described.

10. The combination of the rolls carrying the punches, the brush arranged above the roller and bearing on the periphery thereof, and the perforated pipe to supply coolingfluid to the brush, for the purpose set forth, substantially as described.

11. The combination, with the roller, ofthe brush bearing against the upper roll, the reservoir or tank, and the perforated pipe communicating therewith and with the brush to supply fluid to thelattcr, said pipe having the regulating-valve or stop-cock, substantially as described.

12. The combination, with the roll having the peripheral punches, of the roll having the fitted in said groove, substantially as described.

In testimonythat we claim the foregoing as our own we have hereto affixed our signatures in presence of two witnesses.

EDWIN FIRTH. JACOB GORNTHWAITE.

\Vitnesses:

WILLIAM Isnnnnncrr, GERALD G. RIORDAN. 

